Sreetips Refines $27000 Gold Bar
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1:08:26
Sreetips Refines $11,000 Gold Bar
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53:16
Urban Mining Mother Lode
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43:15
Combien coûte la fabrication d'une once d'argent ?
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13:27
Le CPU Gold peut-il être directement fondu? Recyclage électronique et exploitation urbaine
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59:39
White Gold Refining With Oxalic Acid
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26:34
Coulée de lingots d'or
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14:50
100% Virginia Gold Paydirt - The Prospecting Geologist
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25:44